"witg" was presumably a typo for "with"
"mek" is short for methyl ethyl ketone, a pretty powerful solvent.
For over a decade while I worked repairing tape recorders and 16mm projectors, we used MEK for cleaning deteriorated rubber residue and grease/oil.
Never wore gloves or used any ventilation...
We also used to rub mercury on coins to make them shiny, just for yucks.
And we smashed florescent bulbs so they would fit in the trash.
It's a wonder any of us survived.
Ever since I began with building models, tearing apart my bicycle, moving on to working on cars, and eventually into the auto upholstery trade in 1973, I'd been washing down most everything with solvents. Varsol, gasoline, lacquer thinner, MEK, chloroethene, you name it, and rarely with gloves on or a respirator. At the end of most work days, my hands were usually covered with glue, which I would clean off with more solvent. In 2018, I was diagnosed with (Surprise!) stage 4 lymphoma. Thanks to modern medicine, I was able to beat it, and gloves are now part of my daily uniform, but it was a tough lesson to learn. Don't be dumb like I was....wear the protection!!